Their unique relationship moved author Knut Georg Andresen to write a book about it entitled 'Johannes and Grandpa'.

Høsflot has coached his grandson for many years and is now working closely with the coach of Norway’s sprint team, Arild Monsen.

The sprightly septuagenarian recently said that people should expect to see an even stronger Klæbo this winter, even though that is hard to believe after a winter where he clinched not just three Olympic golds but also captured his first World Cup crystal globe.

But he seemed to relax prematurely on the final straight, and Alexander Bolshunov took advantage to win by just one-tenth of a second.

Fired up by his brother

CNN once called Klæbo “Norway’s Justin Bieber”.

Maybe it's because of his massive popularity thanks to his ski prowess, but it could also be linked to his backstory, which is not that of a typical cross-country skier.

He even runs a vlog, in which you get to see every aspect of his daily life as a ski star, which is filmed and edited by his younger brother Ola.

His brother has more talents than just filming and editing videos though. The teenager produces music under the artist name OKEY, and his songs, which regularly feature in the vlogs, can be found online.

And he has performed in front of 20,000 people at the Bislett Stadion in Oslo, the venue for the opening ceremony of the 1952 Winter Olympic Games.